Title :
A Testbed with a Practical Smart Antenna for Directional MAC Protocols in Ad hoc Networks
Author :
Mitsuhashi, Hikaru ; Watanabe, Masahiro ; Obana, Sadao ; Bandai, Masaki ; Watanabe, Takashi
Author_Institution :
Grad. Sch. of Inf., Shizuoka Univ., Hamamatsu
Abstract :
Recently, several MAC protocols using directional antennas have been proposed for ad hoc networks, which are mainly evaluated by computer simulations. This paper develops a MAC protocol testbed called TRNC/ESPAR for ad hoc networks, which enables the evaluation of directional MAC protocols as well as omni-directional protocols. At first, we investigate the requirements for the testbed. Based on them, TRNC/ESPAR is designed to consist of ESPAR as a practical smart antenna, IEEE 802.15.4 as a wireless module, GPS and gyro modules to support a location dependant MAC. After describing the detail design, we investigate the basic performance of the testbed and implement CSMA/CA. Implementing one of directional MAC protocols with 4 nodes, DMAC shows that the protocol doubles the throughput compared with CSMA/CA because of SDMA effect but if the pair is too near DMAC throughput degraded in a real environment, which could not be found without the testbed.
Keywords :
access protocols; ad hoc networks; adaptive antenna arrays; directive antennas; ad hoc networks; directional MAC protocols; directional antennas; omni-directional protocols; practical smart antenna; Ad hoc networks; Computer simulation; Degradation; Directional antennas; Directive antennas; Global Positioning System; Media Access Protocol; Multiaccess communication; Testing; Throughput;
Conference_Titel :
Advanced Information Networking and Applications Workshops, 2007, AINAW '07. 21st International Conference on
Conference_Location :
Niagara Falls, Ont.
Print_ISBN :
978-0-7695-2847-2
DOI :
10.1109/AINAW.2007.59
